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Beginning of assembly language implementation
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Bill Chatfield
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20
asm/copy.s
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asm/copy.s
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* Program: Copy file
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* Author: Bill Chatfield
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use symbols
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use macros
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* Get source file name
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getSource
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puts sourcePrompt
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* Get destination directory
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>>> puts;destPrompt
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* Variables
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sourcePrompt asc "File to copy:",00
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destPrompt asc "Directory to copy it to:",00
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124
asm/macros.s
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124
asm/macros.s
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********************************
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* *
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* PUTS MACRO *
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* *
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* APPLESOFT MUST BE IN MEMORY *
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* BECAUSE THE STROUT SUB IS *
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* USED. *
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* *
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* X & Y ARE PRESERVED *
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* *
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* ]1 - ADDRESS OF STRING *
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* *
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********************************
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PUTS MAC
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TYA ;PRESERVE Y
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PHA
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LDA #<]1 ;PUT LOW BYTE INTO A
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LDY #>]1 ;PUT HIGH BYTE INTO Y
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JSR STROUT ;CALL APPLESOFT'S STRING PRINT
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PLA ;RESTORE Y
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TAY
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<<<
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********************************
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* *
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* PUTS80 MACRO *
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* *
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* IN 80-COL MODE EVEN COLUMNS *
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* ARE IN AUXILIARY MEMORY *
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* WHILE ODD COLUMNS ARE IN *
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* MAIN MEMORY. *
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* *
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* ]1 - CHARACTER TO DISPLAY *
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* ]2 - DESIRED COLUMN *
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* *
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********************************
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PUTS80 MAC
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TYA ;MOVE Y TO A
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PHA ;SAVE Y VALUE ON STACK
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SEI ;DISABLE INTERRUPTS
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STA STOR80ON ;ENABLE MAIN/AUX MEM SWITCHING
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LDA ]2 ;LOAD 80-COL HORIZ CURSOR POSITN
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LSR A ;DIVIDE BY 2 TO CALC PHYS COLUMN
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BCC AUXMEM ;IF EVEN, COLUMN IS IN AUX MEM
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MAINMEM STA PAGE2OFF ;TURN OFF AUX MEM, MAIN MEM ON
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JMP CONTINUE ;AVOID AUX MEM ENABLE
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AUXMEM STA PAGE2ON ;TURN ON AUX MEM, MAIN MEM OFF
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CONTINUE TAY ;MOVE CURSOR POSITION TO Y
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LDA ]1 ;LOAD THE CHARACTER TO DISPLAY
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STA (BASL),Y ;DISPLAY THE CHARACTER
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STA PAGE2OFF ;TURN MAIN MEM BACK ON
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CLI ;ENABLE INTERRUPTS
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PLA ;PULL Y VALUE FROM STACK
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TAY ;RESTORE Y VALUE
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<<<
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********************************
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* *
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* GETKEY MACRO *
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* *
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********************************
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GETKEY MAC
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BIT KBD ;TEST FOR KEY PRESSED
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BPL GETKEY ;WAIT FOR KEY PRESSED
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LDA KBD ;GET THE KEY THAT WAS PRESSED
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BIT KBDSTRB ;CLEAR KEYBOARD STROBE
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STA ]1 ;STORE THE KEY THAT WAS READ
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<<<
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********************************
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* *
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* PUTSCUSTOM MACRO *
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* *
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********************************
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PUTSCUSTOM MAC
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TYA ;PRESERVE Y
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PHA
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LDY #0 ;PREPARE LOOP INDEX
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]NEXTCHR LDA ]1,Y ;LOAD A CHARACTER
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CMP #0 ;CHECK FOR END OF STRING
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BEQ FINISH
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JSR COUT
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INY
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JMP ]NEXTCHR
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FINISH PLA ;RESTORE Y
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TAY
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<<<
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********************************
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* *
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* PAUSE Macro *
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* *
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********************************
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PAUSE MAC
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PUTS ]1
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JSR RDKEY
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JSR CROUT
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<<<
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********************************
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* *
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* ADD_TO_ADDR MACRO *
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* *
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********************************
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ADD_TO_ADDR MAC
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LDA ]1
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CLC
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ADC ]2
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STA ]1
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BCC DONE
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INC ]1+1
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DONE <<<
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64
asm/symbols.s
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64
asm/symbols.s
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********************************
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* *
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* SYMBOLS REFERENCING SYSTEM *
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* RESOURCES *
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* *
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* AUTHOR: BILL CHATFIELD *
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* LICENSE: GPL *
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* *
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********************************
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CH EQU $24 ;HORIZ CHAR POS (40-COL)
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BASL EQU $28 ;BASE ADDR FOR CURR VIDEO LINE
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KSWL EQU $38 ;KEYBOARD SWITCH LOW BYTE
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KSWH EQU $39 ;KEYBOARD SWITCH HIGH BYTE
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IN EQU $200 ;256-CHAR INPUT BUFFER
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OURCH EQU $57B ;HORIZONTAL POSITION (80-COL)
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OURCV EQU $5FB ;VERTICAL POSITION (80-COL)
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* ProDOS Addresses
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MLI EQU $BF00 ;ADDRESS OF MLI ENTRY POINT
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* Memory Mapped Input/Output addresses C000 - CFFF
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KBD EQU $C000 ;KEYBOARD DATA + STROBE
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STOR80ON EQU $C001 ;ENABLE AUXILIARY MEM SWITCHING
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CXROMOFF EQU $C006 ;ENABLE SLOT ROMS
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CXROMON EQU $C007 ;TURN ON INTERNAL ROM
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KBDSTRB EQU $C010 ;CLEAR KEYBOARD STROBE
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ALTCHAR EQU $C01E ;>=$80 IF IN 80-COL
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PAGE2OFF EQU $C054 ;TURN ON MAIN MEMORY
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PAGE2ON EQU $C055 ;TURN ON AUXILIARY MEMORY
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BASICIN EQU $C305
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BINPUT EQU $C8F6
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ESCAPING EQU $C918
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NOESC EQU $C9B7 ;HANDLES KEY OTHER THAN ESC
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INVERT EQU $CEDD ;80-col INVERT CHAR ON SCREEN
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PICK EQU $CF01 ;80-col PICK CHAR OFF SCREEN
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* Subroutines stored in ROM addresses D000 - FFFF
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STROUT EQU $DB3A ;BAS? PRINT NULL-TERM STR IN AY
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HEXDEC EQU $ED24 ;HEX-TO-DECIMAL CONVERSION
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PRINTXY EQU $F940 ;MONITOR PRINT X & Y AS HEX
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RDKEY EQU $FD0C ;READS 1 CHAR
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KEYIN EQU $FD1B
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RDCHAR EQU $FD35
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GETLN EQU $FD6A
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CROUT EQU $FD8E ;PRINT A CARRIAGE RETURN
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PRBYTE EQU $FDDA ;MONITOR PRINT BYTE 2 HEX DIGITS
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COUT EQU $FDED ;WRITE A CHARACTER
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BELL EQU $FF3A ;SUBROUTINE TO BEEP
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* Keyboard key code definitions
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ESC EQU $9B ;ESC WITH HIGH BIT SET
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RTARROW EQU $95 ;RIGHT ARROW WITH HIGH BIT SET
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DELETE EQU $FF ;DELETE WITH HIGH BIT SET
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BKSPACE EQU $88 ;BACKSPACE WITH HIGH BIT SET
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* ProDOS command definitions
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ON_LINE EQU $C5 ;ID FOR ON_LINE MLI SYSTEM CALL
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